1197989568 has 112 divisors (see below), whose sum is σ = 3570488160. Its totient is φ = 393818112.

The previous prime is 1197989563. The next prime is 1197989693. The reversal of 1197989568 is 8659897911.

It is not an unprimeable number, because it can be changed into a prime (1197989561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121396 + ... + 130892.

Almost surely, 2^1197989568 is an apocalyptic number.

1197989568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1197989568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785244080).

1197989568 is an abundant number, since it is smaller than the sum of its proper divisors (2372498592).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1197989568 is an equidigital number, since it uses as much as digits as its factorization.

1197989568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9591 (or 9575 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 63.

The square root of 1197989568 is about 34611.9859008408. The cubic root of 1197989568 is about 1062.0647922422.

The spelling of 1197989568 in words is "one billion, one hundred ninety-seven million, nine hundred eighty-nine thousand, five hundred sixty-eight".